Educationalists have been concerned with the labelling and treatment of children with mental health difficulties in the education system in England for some time. These concerns have centred on the role of policy in 'othering' such students as deviant learners. The unprecedented number of children suffering from mental illnesses, has forced policymakers to address children's mental health difficulties. This has involved the identification of a sub-set of the school population experiencing 'less-severe' mental health issues, to be addressed through a suite of policy interventions delivered by whole-school approaches, but targeted towards children situated as mentally 'weak'. Drawing upon a Foucauldian theory of governmentality that addresses children's behavioural motivations, an in-depth analysis of a number of educational policy initiatives related to mental health is conducted, that it is argued are fundamentally flawed. This analysis is followed by a discussion of the performative culture of High Stakes Testing in contributing to children's mental health difficulties. Here it is argued that a narrative of mental weakness serves to justify a neoliberal rationality towards the treatment of children for whom the performative logic assumed to motivate all learners, fails.